Upgrade as in send me your old one and replace it with a new one? Or a discounted rate for a return customer. Anyone can upgrade there machine simply by clicking purchase on my website lol. I have no use for old machines, i would never have a option like that. Now if your a customer that always buys from me then you deserve a discount just like buying in bulk. If you purchased a machine once or years ago im gonna go dig up my old razor phone and upgrade it for a iphone6. Now if you want to sign a 2 year contract we might make a deal